<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header
      ><div class="header-box">
        <img src="@/assets/images/logo.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout()">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ?'64px':'200px'">
        <div class="toggle-button" @click="toggleCollapse()">{{isCollapse ==true?"展开":"收起"}}</div>
        <!-- 侧边栏菜单区 -->
        <el-menu
          :collapse=isCollapse
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF"
          :unique-opened=true
          :collapse-transition =false
          :router="true"
          :default-active="activePath"
          
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="item.id + ''"
            v-for="item in menulist"
            :key="item.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]" style="margin-right:10px"></i>
              <!-- 文本 -->
              <span>{{ item.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index=" '/'+subItem.path "
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavState('/'+subItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <el-container>
        <!-- 右侧内容主体 -->
        <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
        </el-main>
        <el-footer>关于我们 | 联系我们</el-footer>
      </el-container>
      
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      //左侧菜单数据
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao',
      },
      //是否折叠
      isCollapse:false,
      //被激活的链接地址
      activePath:'',
    }
  },
  created() {
    this.getMeauList(),
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      //清除在sessionStorage中token
      window.sessionStorage.clear()
      //跳转到登录页
      this.$router.push('/login')
    },
    //获取所有的菜单
    async getMeauList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res.data)
    },
    //点击按钮,切换菜单的折叠与展开
    toggleCollapse(){
      this.isCollapse = !this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
}
</script>

<style lang="less" scoped>
 ::v-deep.header-box {
    display: flex;
    justify-content: center;
    align-items: center;
  }

::v-deep.header-box img {
    width: 60px;
    height: 60px;
  }
::v-deep.home-container {
  height: 100%;
}
::v-deep.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between; //左右贴边对齐
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
::v-deep.el-aside {
  background-color: #333744;
  .el-menu{
    border-right:none;
  }
}
::v-deep.el-main {
  background-color: #eaedf1;
}
::v-deep.toggle-button{
  background-color: #4a5064;
  font-size: 14px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.3em;
  cursor: pointer;
}
::v-deep.el-footer {
  display: flex;
  justify-content: center;
  align-items: center;
}
</style>
